Subacute sclerosing panencephalitis: A clinical appraisal

Area of Science:

• Neurology
• Infectious Diseases
• Pediatrics

Background:

• Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological disorder.
• It results from persistent measles virus infection in immune-resistant individuals.
• SSPE primarily impacts children and young adults.

Purpose of the Study:

• To delineate the clinical characteristics and natural progression of SSPE.
• To analyze demographic, clinical, electrophysiological, and imaging findings in SSPE patients.

Main Methods:

• Data collected from 34 SSPE patients diagnosed between 2004-2010 using Dyken's criteria.
• Analysis included demographical, clinical, electrophysiological (EEG), and neuroimaging (MRI) features.
• Cerebrospinal fluid (CSF) anti-measles antibody levels were assessed.

Main Results:

• The study included 34 patients (76.5% male), with onset ages ranging from 3 to 31 years.
• Childhood SSPE (n=21) and adult-onset SSPE (n=13) were observed; 85.3% had low socioeconomic status.
• Common symptoms included scholastic backwardness (52.5%) and seizures (23.5%). EEG showed characteristic periodic complexes, and all patients had positive CSF anti-measles antibodies. Mean incubation period was 9.6 years.

Conclusions:

• SSPE is more prevalent in individuals from low socioeconomic backgrounds.
• Adult-onset SSPE mirrors childhood SSPE clinically, with a notable exception of a longer interval from measles infection to ophthalmic symptoms presentation.
• The study highlights the long-term, progressive nature of SSPE, with varied patient outcomes during follow-up.